misc/mei: Allow building Intel ME interface on non-x86

misc/mei: Allow building Intel ME interface on non-x86

The xe driver supports dGPUs which can be plugged into non-x86 machines,
and exposes a MEI GSC interface, so this driver is no longer x86 only.

Cc: Usyskin, Alexander <alexander.usyskin@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Simon Richter <Simon.Richter@hogyros.de>
Link: https://patch.msgid.link/20260107182615.488194-2-Simon.Richter@hogyros.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>